If he was returning to his car and was jumped by the deceased, then there is no doubt Mr. Zimmerman was well within his rights to defend himself the way he did. Period.
If no proof can be obtained that Mr. Zimmerman instigated the attack upon himself, he should have nothing to worry about aside from a vindictive government bent upon incarcerating him to appease those squealing for “justice”.
Believe me, I understand what you're saying, but no indications have been presented, at this point, that Mr. Zimmerman actually instigated the attack upon himself.
How about I speculate some like so many have on this board.
Perhaps his girlfriend goaded him into attacking Mr. Zimmerman whilst they were talking on the phone... It certainly wouldn't be any more implausible than the scenarios I've seen from many on this forum already convicting Mr. Zimmerman of Murder or Manslaughter.
If he was jumped from behind (widely speculated because of wound on back of his head and this John guy, but not proven in any fashion one way or the other as that wound could come from head hitting the ground), then it's likely going to work in his favor.
I saw the police report
What we know is this. 1. There was an altercation and a shooting. This is a manslaughter investigation.
2. Zimmerman was taken to the station and interviewed (interrogated). We do not know what he said. We won't know at this time.
3. He was detained (handcuffed) and released after his interview. Detained does not mean arrested, but he was likely given his Miranda warnings so his statements won't be suppressed if he said something to incriminate himself.
4. He was not charged when released. That means either there is not enough evidence for there to be probable cause for an arrest or SPD/DA's don't think they can get a conviction at that time. That may or may not change in the future with new developments. A grand jury is being convened as well.